Nielsen ID3 User Manual page 55

FD CID SID mismatch; FD CID TS inconsistency
21 1444645071 183 9020
The FD CID Timestamp is the decrypted timestamp component of the 24-byte PC
Content ID.
Under ideal conditions, the FD CID timestamp is a raw NAES 2 timestamp that
translates to the start of the current broadcast day (3 a.m. in the time zone where the
NAES encoder was operating). If the FD CID SID is set to 0 or is inaccurate, the FD
CID timestamp should be ignored.
All CID timestamps are derived from the watermarks to which the FD CID SID
corresponds. They are not derived from the "current time" that your application
supplies to the PCM-to-ID3 SDK.
The snippet above shows the tag with sequence number 21, which has a badly
decoded FD timestamp. As a result, the "Comments" field in this row reports "FD CID
TS inconsistency." Ignore this error because the CID is correct, and only the decoded
watermark is in error.
•
FD CID Offset
18 1444645043 155 9020
The FD CID offset specifies the number of seconds that separate the FD CID
timestamp and a representative Watermark FD Timestamp for the current tag. Note
that all timestamps are translated to NAES 2 format before any calculations are
made. Ideally:
In the example comma-delimited file snippet, note that, for sequence number 18:
o
o
Therefore,
o
o
The watermark FD timestamp exactly matches the FD CID TS + offset, so the values
are correct.
Release 1.8 Revision F
2800909039 9020 2800851248
2800909011 9020 2800851248
(<FD CID timestamp> + <FD CID Offset> - 10) <= Watermark FD
Timestamp <=
(<FD CID timestamp> + <FD CID Offset> + 10)
2800851248
FD CID TS =
57759
FD CID Offset =
FD CID TS + offset = 2800909007 (calculated)
Watermark FD timestamp =
57791 26516 1582259560
57763 9120 2800909007
2800909007
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